Fontmorigny Abbey was founded in 1149 as a daughter abbey of Clairvaux. Fontmorigny experienced major economic development from the Middle Ages, by means of the steel industry. It suffered in the Hundred Years' War and was sold as worker houses during the French Revolution.
The oldest parts of the building date back to the second half of the 12th century, while the convent buildings were rebuilt in the 18th century. Today the abbey is still on restoration and organizes exhibitions and a prestigious annual music festival.
The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.